linux-kernel - Re: [PATCH v2] media: venus: dynamic handling of bitrate

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Date:   Thu, 15 Nov 2018 11:19:12 +0200
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Malathi Gottam <mgottam@...eaurora.org>,
        stanimir.varbanov@...aro.org, hverkuil@...all.nl,
        mchehab@...nel.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, acourbot@...omium.org,
        vgarodia@...eaurora.org
Subject: Re: [PATCH v2] media: venus: dynamic handling of bitrate

Hi Malathi,

Thanks for the patch!

On 11/2/18 2:41 PM, Malathi Gottam wrote:
> Any request for a change in bitrate after both planes
> are streamed on is handled by setting the target bitrate
> property to hardware.
> 
> Signed-off-by: Malathi Gottam <mgottam@...eaurora.org>
> ---
>  drivers/media/platform/qcom/venus/venc_ctrls.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)

Acked-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>

> 
> diff --git a/drivers/media/platform/qcom/venus/venc_ctrls.c b/drivers/media/platform/qcom/venus/venc_ctrls.c
> index 45910172..f90a34e 100644
> --- a/drivers/media/platform/qcom/venus/venc_ctrls.c
> +++ b/drivers/media/platform/qcom/venus/venc_ctrls.c
> @@ -79,7 +79,9 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
>  {
>  	struct venus_inst *inst = ctrl_to_inst(ctrl);
>  	struct venc_controls *ctr = &inst->controls.enc;
> +	struct hfi_bitrate brate;
>  	u32 bframes;
> +	u32 ptype;
>  	int ret;
>  
>  	switch (ctrl->id) {
> @@ -88,6 +90,19 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
>  		break;
>  	case V4L2_CID_MPEG_VIDEO_BITRATE:
>  		ctr->bitrate = ctrl->val;
> +		mutex_lock(&inst->lock);
> +		if (inst->streamon_out && inst->streamon_cap) {
> +			ptype = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE;
> +			brate.bitrate = ctr->bitrate;
> +			brate.layer_id = 0;
> +
> +			ret = hfi_session_set_property(inst, ptype, &brate);
> +			if (ret) {
> +				mutex_unlock(&inst->lock);
> +				return ret;
> +			}
> +		}
> +		mutex_unlock(&inst->lock);
>  		break;
>  	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
>  		ctr->bitrate_peak = ctrl->val;
> 

-- 
regards,
Stan